Jointing devices for concrete piles



Dec. 5, 1967 JAN AKE NILSSON ET AL 3,356,398

JOINTING DEVICES FOR CONCRETE FILES Filed March 25, 1965 FIG. I

2 Sheets-Sheet 1 A c E NI L55 0 KINVENTORS J N K MD STEh I BORJ'ENILSSON BY m4 ATTORNEYS Dec. 5, 1967 JAN AKE NILSSON ETAL 3,

JOINTING DEVICES FOR CONCRETE FILES Filed March 25, 1965 2 Sheets-SheetFIG. 3

7 .40 ii/j m 1 97/99 07 INVENTORS TAN AKEHNILSSONRND STE BORJENILSSUNWWW ATTORNEYS United States Patent JOINTING DEVICES FOR CONCRETE PILESJan A rke Nilsson, Bjorboholrn, Sweden, and Sten Biirje Nilsson, 1Brittsornmargatan, Goteborg, Sweden Filed Mar. 25, 1965, Ser. No.442,748

Claims priority, application Sweden, Apr. 1, 1964,

2 Claims. (Cl. 287-103) ABSTRACT OF THE DISCLOSURE The present jointingdevice is for joining concrete piles and for this purpose each end of aconcrete pile is provided with a fitting of the jointing members so thatadjacent ends of a pair of piles can be interlocked.

According to the present invention, the two fitting members are mutuallysimilar and comprise two sections on either side of a plane coincidingwith the longitudinal axis of the piles and complementary to each otherin such a manner that each one of the said fitting members on one of thepile-ends can be caused to engage the corresponding complementarymembers of the end of the other pile. Since the two fittings forming thejoint are mutually alike, the jointing work can be considerablysimplified and great saving effected in the cost of production of thefittings.

According to the present invention, the portions of the fitting designedfor interlocking purposes are preferably provided with undercut edgeswhich, upon coupling the two fittings together, are caused to engageeach other by the perpendicular sliding engagement of the jointingmembers in relation to the plane which coincides with the longitudinalaxis of the piles.

The jointing members are preferably provided with recesses which, ininterlocked condition, are so located that they face each other for thepurpose of forming a channel running substantially parallel with thesaid longitudinal plane and being adapted to accommodate a lockingmember in the interlocked position of the two jointing sections.

An embodiment of the present invention will be further described belowwith reference to the attached drawings by way of example, in which:

FIGURE 1 represents an end view of a jointing device according to thepresent invention;

FIGURE 2 is a cross section in the longitudinal direction of the twopiles through a pile joint formed by jointing members according toFIGURE 1;

FIGURE 3 is a cross section through the joint along the line III-III inFIGURE 1;

FIGURE 4 is a smaller scale view in perspective of the end-portions oftwo concrete piles fitted with jointing members according to the presentinvention prior to being joined together; and

FIGURE 5 is a partial side elevation of a locking bar designed to lockthe jointing sections in interlocked position.

In the embodiment shown in the drawings, the joint fitting shown inFIGURE 1 has the shape of a circular metal plate 1, the diameter ofwhich corresponds substantially to the diameter of the concrete pile 2for which the fitting is intended. The object of the plate 1 is to have3,356,393 Patented Dec. 5, 1967 its one flat side aligned with the endof a concrete pile 2 in the manner illustrated in FIGURE 2 and attachedto the pile by being welded on to a metal sleeve 3 fixed to the pile-endin known manner. The outward-facing side of the plate 1 not only has aprojecting portion 4 which, in the present embodiment has a triangularshape, but also a projecting portion 5 of such a shape that it forms theborders of an open space or recess 6, similar in shape to the portion 4.The two portions 4 and 5 are so disposed on opposite sides of and at ashort distance from, a diametrical plane indicated by the line AA inFIGURE 1, that the two halves of the fitting separated by the saidplane, have a substantially mutually complementary form, enabling thetwo end-joint sections of this type to be brought into engagement witheach other in such a manner that the projecting portion 4 of one of thetwo joint fittings is introduced into the recess 6 of the other fitting,and the recessed portion 6 of the first-mentioned fitting is so designedas to accommodate the projecting portion 4 of the other fitting. Thetriangular portion 4 is provided along two sides with step-like undercutedges 7 and 8, FIG. 3, and the edge portions of projecting portion 5forming the borders of the recess 6, are undercut at 9 and 10respectively in a similar manner.

On joining together two piles provided with a jointing device accordingto the present invention, the two pileends are brought into contact witheach other in the manner illustrated in FIGURE 4, so that one of thejoint fittings is displaced degrees on the longitudinal axis of the pilein relation to the other joint fitting, thus enabling the projectingportion 4 of each pile-end fitting to slide into the recess 6 of theopposite end fitting. For alignment purposes it is necessary for thelongitudinal axes of the piles to be slightly mutuallyparallel-displaced, so as to enable the undercut edges 7 and 8 of theprojecting portion 4 of the fitting to engage the corresponding edges 9and 10 respectively inside the recesses 6. Relative to each other, thepile-ends are then moved in the direction indicated by the arrow B inFIGURE 4, so that the longitudinal axes of the piles are then inalignment, thus enabling the undercut edge portions 7 and 8 of eachjointing portion 4 to engage the corresponding undercut edge portions 9and 10 respectively of the other jointing portion 5 as shown in FIGURE2. In the thus interlocked position of the fitting, the intermediatespaces between the portions 4 and 5 of each section of the joint fittingassume the shape of a through channel or groove, and into this channelthere is introduced a locking bar 11 for the purpose of fixing the twopile-end fittings in interlocked position.

The present invention is not limited to the embodiment described aboveand shown in the drawings by way of example. Various details may bemodified without deviating from the fundamental principle of the presentinvention. Thus, for example, instead of the shape of the portion 4 andthe corresponding recess 6 taking the form as shown in the drawings,they could equally well take the shape of a semi-circle or a segment, orany other convenient or appropriate shape.

What we claim is:

1. In a jointing device for joining concrete piles, a pair ofcorresponding plate members, each said plate member being substantiallyidentical in shape and having a first axially projecting portion and asecond axially projecting portion spaced from said first portion andterminating in the same plane as said first portion, each saidprojecting portion having a lateral extension in said plane projectingin the same direction and transverse to the axis of said projectingportion and defining a transverse groove between the main portion ofsaid plate member and its lateral extension, the transverse groove ofone said plate being adapted to interlock with said lateral extension ofthe other said plate member, whereby said plate members may be broughttogether to mutually interlock, said first axially projecting portionsbeing triangular in shape and said second axially projecting portionsbeing substantially V-shaped so as to complement the shape of said firstaxially projecting portions.

2. A jointing device according to claim 1, said axially projectingportions being proportioned relative to each 4 diametrally of said platemembers when assembled and which space is adapted to receive a lockingbar.

References Cited UNITED STATES PATENTS 1,285,651 11/1918 Eden.

1,473,228 11/1923 Grundel 28720.92.7 X

3,044,806 7/1962 Prissler et a1 287103 X 3,104,532 9/1963 Severinsson6l-53 3,172,508 3/1965 Doering et al. 287189.36

CARL W. TOMLIN, Primary Examiner,

other so as to provide a diametral transverse space 15 A. V.KUNDRAT,Assistant Examiner.

1. IN A JOINTING DEVICE FOR JOINING CONCRETE PILES, A PAIR OFCORRESPONDING PLATE MEMBERS, EACH SAID PLATE MEMBER BEING SUBSTANTIALLYIDENTICAL IN SHAPE AND HAVING A FIRST AXIALLY PROJECTING PORTION AND ASECOND AXIALLY PROJECTING PORTION SPACED FROM SAID FIRST PORTION ANDTERMINATING IN THE SAME PLANE AS SAID FIRST PORTION, EACH SAIDPROJECTING PORTION HAVING A LATERAL EXTENSION IN SAID PLANE PROJECTINGIN THE SAME DIRECTION AND TRANSVERSE TO THE AXIS OF SAID PROJECTINGPORTION AND DEFINING A TRANSVERSE GROOVE BETWEEN THE MAIN PORTION OFSAID PLATE MEMBER AND ITS LATERAL EXTENSION, THE TRANSVERSE GROOVE OFONE SAID PLATE BEING ADAPTED TO INTERLOCK WITH SAID LATERAL EXTENSION OFTHE OTHER SAID PLATE MEMBER, WHEREBY SAID PLATE MEMBERS MAY BE BROUGHTTOGETHER TO MUTUALLY INTERLOCK, SAID FIRST AXIALLY PROJECTING PORTIONSBEING TRIANGULAR IN SHAPE AND SAID SECOND AXIALLY PROJECTING PORTIONSBEING SUBSTANTIALLY V-SHAPED SO AS TO COMPLEMENT THE SHAPE OF SAID FIRSTAXIALLY PROJECTING PORTIONS.